Journal of the Korean Society of Marine Environment & Safety (해양환경안전학회지)

The Korean Society of Marine Environment and safety (해양환경안전학회)
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Estimation of Stocking Density using Habitat Suitability Index and Ecological Indicator for Oyster Farms in Geoje-Hansan Bay

서식적합도와 생태지표를 이용한 거제한산만 굴양식장의 입식밀도 산정

  • Cho, Yoon-Sik (Marine Environment Research Division, National Fisheries Research & Development Institute) ;
  • Lee, Won-Chan (Marine Environment Research Division, National Fisheries Research & Development Institute) ;
  • Hong, Sok-Jin (Marine Environment Research Division, National Fisheries Research & Development Institute) ;
  • Kim, Hyung-Chul (Marine Environment Research Division, National Fisheries Research & Development Institute) ;
  • Kim, Jeong-Bae (Marine Environment Research Division, National Fisheries Research & Development Institute) ;
  • Park, Jung-Hyun (Marine Environment Research Division, National Fisheries Research & Development Institute)
  • 조윤식 (국립수산과학원 어장환경과) ;
  • 이원찬 (국립수산과학원 어장환경과) ;
  • 홍석진 (국립수산과학원 어장환경과) ;
  • 김형철 (국립수산과학원 어장환경과) ;
  • 김정배 (국립수산과학원 어장환경과) ;
  • 박정현 (국립수산과학원 어장환경과)
  • Received : 2012.05.16
  • Accepted : 2012.06.25
  • Published : 2012.06.30
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Abstract

Most of Korean farms have been developed in the semi-closed bay, and its position is very vulnerable to the coastal contamination due to the long term and the high density. So, mariculture management is very essential for the sustainable aquaculture. Some of the specific ways would be the assessment of the optimal stocking density for mariculture management zone and this has to consider both the suitable site selection and the assessment of ecological carrying capacity. Habitat suitability index(0.0 totally unsuitable habitat, 1.0 optimum habitat) and ecological indicator(Filtration pressure indicator) was used to assess the stocking density for oyster farms in Geoje-Hansan Bay. Geoje Bay showed the higher habitat suitability index value 0.75 than Hansan Bay 0.53, indicating that Geoje Bay is more suitable for oyster farming. Ecological indicator showed different stocking density according to the coastal characteristics in Geoje-Hansan Bay. Consequently, it is desirable that the stocking density in Geoje Bay should reduce average 40% and Hansan Bay, average 60% than present, in order to meet the ecological carrying capacity. The assessment of the stocking density could solve various problems such as the coastal contamination, environmental aggravation and the productivity decrease and this study could be a scientific basis to establish the policies for mariculture management.

대부분의 국내 어장들은 반폐쇄성 내만에 집중되어 있으며, 장기 양식과 높은 입식밀도에 의한 연안오염에 매우 취약한 위치를 점하고 있기 때문에, 지속적인 양식을 위하여 어장관리가 매우 중요한 실정이다. 이를 위한 방안으로 적지선정과 생태학적 환경수용력을 함께 고려한 최적 입식밀도 산정이 될 수 있다. 거제한산만 굴양식장의 입식밀도 산정을 위하여 0.0이 비적지, 1.0이 적지임을 나타내는 서식적합도(Habitat suitability index)와 생태지표인 여과압 지표(Filtration pressure indicator)가 이용되었다. 거제만의 서식적합도는 0.75로서 한산만 0.53보다 높았으며, 이는 거제만이 굴양식에 좀 더 적합함을 의미한다. 생태지표는 연안특성에 따라 다른 입식밀도를 나타내었으며, 결과적으로 거제만의 굴양식장에 대하여 현 입식밀도와 비교하여 평균 40%, 한산만은 평균 60% 저감 입식하여야 생태학적 환경수용력을 만족하는 것으로 나타났다. 입식밀도의 산정은 현재 국내 양식업이 직면한 연안오염, 환경악화, 생산성 감소에 대한 해결책을 제공할 수 있으며, 이 연구는 어장관리 정책 설립에 대한 과학적 근거로 활용될 수 있을 것이다.

Keywords

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